• Andrey (4/8) Sep 03 2018 Hello,
• Andrea Fontana (4/12) Sep 03 2018 Not the best solution, but did you try to make querty template
• Paul Backus (7/15) Sep 03 2018 Congratulations, you've run into one of D's oldest and most
• vit (4/12) Sep 03 2018 Try this:

Andrey <saasecondbox yandex.ru> writes:

Hello,

Here is a code with comments: https://run.dlang.io/is/BNl2Up.

I don't understand how to pass lambda into template.
I get an error:
onlineapp.d(18): Error: template instance `qwerty!((i) => "arg" 
~ i.to!string ~ "[0] == '?'", "||")` cannot use local __lambda1 
as parameter to non-global template qwerty(alias mapper, alias 
delimiter)

Andrea Fontana <nospam example.com> writes:

On Monday, 3 September 2018 at 09:09:44 UTC, Andrey wrote:
 Hello,

 Here is a code with comments: https://run.dlang.io/is/BNl2Up.

 I don't understand how to pass lambda into template.
 I get an error:
onlineapp.d(18): Error: template instance `qwerty!((i) => "arg" 
~ i.to!string ~ "[0] == '?'", "||")` cannot use local __lambda1 
as parameter to non-global template qwerty(alias mapper, alias 
delimiter)


Not the best solution, but did you try to make querty template 
global adding a third parameter to pass count?

Andrea

Paul Backus <snarwin gmail.com> writes:

On Monday, 3 September 2018 at 09:09:44 UTC, Andrey wrote:
 Hello,

 Here is a code with comments: https://run.dlang.io/is/BNl2Up.

 I don't understand how to pass lambda into template.
 I get an error:
onlineapp.d(18): Error: template instance `qwerty!((i) => "arg" 
~ i.to!string ~ "[0] == '?'", "||")` cannot use local __lambda1 
as parameter to non-global template qwerty(alias mapper, alias 
delimiter)


Congratulations, you've run into one of D's oldest and most 
annoying known bugs, issue 5710: 
https://issues.dlang.org/show_bug.cgi?id=5710

The solution is to define `qwerty` outside of `exec`, and add an 
additional parameter to pass in `count`: 
https://run.dlang.io/is/VTeizm

vit <vit vit.vit> writes:

On Monday, 3 September 2018 at 09:09:44 UTC, Andrey wrote:
 Hello,

 Here is a code with comments: https://run.dlang.io/is/BNl2Up.

 I don't understand how to pass lambda into template.
 I get an error:
onlineapp.d(18): Error: template instance `qwerty!((i) => "arg" 
~ i.to!string ~ "[0] == '?'", "||")` cannot use local __lambda1 
as parameter to non-global template qwerty(alias mapper, alias 
delimiter)


Try this:

if(mixin(qwerty!((int i) => "arg" ~ i.to!string ~ "[0] == '?'", 
"||")))